if (!tl.filePathSupplied('nugetConfigPath')) {
    nugetConfigPath = null;
}

// due to a bug where we accidentally allowed nuGetPath to be surrounded by quotes before,
// locateNuGetExe() will strip them and check for existence there.
var userNuGetPath = tl.getPathInput('nuGetPath', false, false);
if (!tl.filePathSupplied('nuGetPath')) {
    userNuGetPath = null;
}

var serviceUri = tl.getEndpointUrl("SYSTEMVSSCONNECTION", false);

//find nuget location to use
var nuGetPathToUse = ngToolRunner.locateNuGetExe(userNuGetPath);
var credProviderPath = ngToolRunner.locateCredentialProvider();

var credProviderDir: string = null;
if (credProviderPath) {
    credProviderDir = path.dirname(credProviderPath)
}
else {
    tl._writeLine(tl.loc("NoCredProviderOnAgent"));
}

var accessToken = auth.getSystemAccessToken();
let buildIdentityDisplayName: string = null;
let buildIdentityAccount: string = null;

/*
BUG: HTTP calls to access the location service currently do not work for customers behind proxies.

async function main(): Promise<void> {
    let buildIdentityDisplayName: string = null;
    let buildIdentityAccount: string = null;
    try {
        tl.setResourcePath(path.join(__dirname, "task.json"));

        // set the console code page to "UTF-8"
        if (process.platform === "win32") {
            tl.execSync(path.resolve(process.env.windir, "system32", "chcp.com"), ["65001"]);
        }

        // read inputs
        let searchPattern = tl.getPathInput("searchPattern", true, false);
        let filesList = nutil.resolveFilterSpec(
            searchPattern,
            tl.getVariable("System.DefaultWorkingDirectory") || process.cwd());
        filesList.forEach(packageFile => {
            if (!tl.stats(packageFile).isFile()) {
                throw new Error(tl.loc("NotARegularFile", packageFile));
            }
        });

        let connectedServiceName = tl.getInput("connectedServiceName");
        let internalFeedUri = tl.getInput("feedName");
        let nuGetAdditionalArgs = tl.getInput("nuGetAdditionalArgs");
        let verbosity = tl.getInput("verbosity");

        let nuGetFeedType = tl.getInput("nuGetFeedType") || "external";
        // make sure the feed type is an expected one
        let normalizedNuGetFeedType
            = ["internal", "external"].find(x => nuGetFeedType.toUpperCase() === x.toUpperCase());
        if (!normalizedNuGetFeedType) {
            throw new Error(tl.loc("UnknownFeedType", nuGetFeedType));
        }

        nuGetFeedType = normalizedNuGetFeedType;

        // due to a bug where we accidentally allowed nuGetPath to be surrounded by quotes before,
        // locateNuGetExe() will strip them and check for existence there.
        let nuGetPath = tl.getPathInput("nuGetPath", false, false);
        let nugetVersion = tl.getInput("nuGetversion");
        let userNuGetProvided = false;
        if (tl.filePathSupplied("nuGetPath")) {
            nuGetPath = nutil.stripLeadingAndTrailingQuotes(nuGetPath);
            userNuGetProvided = true;
            if (nugetVersion !== "custom")
            {
                // For back compat, if a path has already been specified then use it.
                // However, warn the user in the build of this behavior.
                tl.warning(tl.loc("Warning_ConflictingNuGetPreference"));
            }
        }
        else {
            if (nugetVersion === "custom")
            {
                throw new Error(tl.loc("NoNuGetSpecified"))
            }
            nuGetPath = nutil.getBundledNuGetLocation(nugetVersion);
        }

        let serviceUri = tl.getEndpointUrl("SYSTEMVSSCONNECTION", false);

        //find nuget location to use
        let credProviderPath = ngToolRunner.locateCredentialProvider();

        const quirks = await ngToolRunner.getNuGetQuirksAsync(nuGetPath);

        // clauses ordered in this way to avoid short-circuit evaluation, so the debug info printed by the functions
        // is unconditionally displayed
        const useCredProvider = ngToolRunner.isCredentialProviderEnabled(quirks) && credProviderPath;
        const useCredConfig = ngToolRunner.isCredentialConfigEnabled(quirks) && !useCredProvider;

        let accessToken = auth.getSystemAccessToken();
        let urlPrefixes = await locationHelpers.assumeNuGetUriPrefixes(serviceUri);
        tl.debug(`discovered URL prefixes: ${urlPrefixes}`);

        // Note to readers: This variable will be going away once we have a fix for the location service for
        // customers behind proxies
        let testPrefixes = tl.getVariable("NuGetTasks.ExtraUrlPrefixesForTesting");
        if (testPrefixes) {
            urlPrefixes = urlPrefixes.concat(testPrefixes.split(";"));
            tl.debug(`all URL prefixes: ${urlPrefixes}`);
        }

        const authInfo = new auth.NuGetAuthInfo(urlPrefixes, accessToken);
        let environmentSettings: ngToolRunner.NuGetEnvironmentSettings = {
            authInfo: authInfo,
            credProviderFolder: useCredProvider ? path.dirname(credProviderPath) : null,
            extensionsDisabled: !userNuGetProvided
        }

        let configFile = null;
        let apiKey: string;
        let feedUri: string;
        let credCleanup = () => { return };
        if (nuGetFeedType == "internal") {
            if (useCredConfig) {
                let nuGetConfigHelper = new NuGetConfigHelper(nuGetPath, null, authInfo, environmentSettings);
                nuGetConfigHelper.setSources([{ feedName: "internalFeed", feedUri: internalFeedUri }]);
                configFile = nuGetConfigHelper.tempNugetConfigPath;
//.........这里部分代码省略.........

async function main(): Promise<void> {
    let buildIdentityDisplayName: string = null;
    let buildIdentityAccount: string = null;

    try {
        tl.setResourcePath(path.join(__dirname, "task.json"));

        // set the console code page to "UTF-8"
        if (process.platform === "win32") {
            tl.execSync(path.resolve(process.env.windir, "system32", "chcp.com"), ["65001"]);
        }

        // read inputs
        let solution = tl.getPathInput("solution", true, false);
        let filesList = nutil.resolveFilterSpec(
            solution,
            tl.getVariable("System.DefaultWorkingDirectory") || process.cwd());
        filesList.forEach(solutionFile => {
            if (!tl.stats(solutionFile).isFile()) {
                throw new Error(tl.loc("NotARegularFile", solutionFile));
            }
        });

        let noCache = tl.getBoolInput("noCache");
        let nuGetRestoreArgs = tl.getInput("nuGetRestoreArgs");
        let verbosity = tl.getInput("verbosity");

        let restoreMode = tl.getInput("restoreMode") || "Restore";
        // normalize the restore mode for display purposes, and ensure it's a known one
        let normalizedRestoreMode = ["restore", "install"].find(x => restoreMode.toUpperCase() === x.toUpperCase());
        if (!normalizedRestoreMode) {
            throw new Error(tl.loc("UnknownRestoreMode", restoreMode));
        }

        restoreMode = normalizedRestoreMode;

        let nugetConfigPath = tl.getPathInput("nugetConfigPath", false, true);
        if (!tl.filePathSupplied("nugetConfigPath")) {
            nugetConfigPath = null;
        }

        // due to a bug where we accidentally allowed nuGetPath to be surrounded by quotes before,
        // locateNuGetExe() will strip them and check for existence there.
        let userNuGetPath = tl.getPathInput("nuGetPath", false, false);
        if (!tl.filePathSupplied("nuGetPath")) {
            userNuGetPath = null;
        }

        let serviceUri = tl.getEndpointUrl("SYSTEMVSSCONNECTION", false);

        // find nuget location to use
        let nuGetPathToUse = ngToolRunner.locateNuGetExe(userNuGetPath);
        let credProviderPath = ngToolRunner.locateCredentialProvider();

        const quirks = await ngToolRunner.getNuGetQuirksAsync(nuGetPathToUse);

        // clauses ordered in this way to avoid short-circuit evaluation, so the debug info printed by the functions
        // is unconditionally displayed
        const useCredProvider = ngToolRunner.isCredentialProviderEnabled(quirks) && credProviderPath;
        const useCredConfig = ngToolRunner.isCredentialConfigEnabled(quirks) && !useCredProvider;

        let accessToken = auth.getSystemAccessToken();
        let urlPrefixes = await locationHelpers.assumeNuGetUriPrefixes(serviceUri);
        tl.debug(`discovered URL prefixes: ${urlPrefixes}`);

        // Note to readers: This variable will be going away once we have a fix for the location service for
        // customers behind proxies
        let testPrefixes = tl.getVariable("NuGetTasks.ExtraUrlPrefixesForTesting");
        if (testPrefixes) {
            urlPrefixes = urlPrefixes.concat(testPrefixes.split(";"));
            tl.debug(`all URL prefixes: ${urlPrefixes}`);
        }

        const authInfo = new auth.NuGetAuthInfo(urlPrefixes, accessToken);
        let environmentSettings: ngToolRunner.NuGetEnvironmentSettings = {
            authInfo: authInfo,
            credProviderFolder: useCredProvider ? path.dirname(credProviderPath) : null,
            extensionsDisabled: !userNuGetPath,
        };

        let configFile = nugetConfigPath;
        let credCleanup = () => { return; };
        if (useCredConfig) {
            if (nugetConfigPath) {
                let nuGetConfigHelper = new NuGetConfigHelper(
                    nuGetPathToUse,
                    nugetConfigPath,
                    authInfo,
                    environmentSettings);
                const packageSources = await nuGetConfigHelper.getSourcesFromConfig();

                if (packageSources.length !== 0) {
                    nuGetConfigHelper.setSources(packageSources);
                    credCleanup = () => tl.rmRF(nuGetConfigHelper.tempNugetConfigPath, true);
                    configFile = nuGetConfigHelper.tempNugetConfigPath;
                }
            }
            else {
                if (credProviderPath) {
                    tl.warning(tl.loc("Warning_NoConfigForOldNuGet"));
//.........这里部分代码省略.........